<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>书籍购物车案例</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <div id="app">
    <div v-if="books.length > 0">
      <table>
        <thead>
          <tr>
            <th>&nbsp;&nbsp;</th>
            <th>书籍名称</th>
            <th>出版日期</th>
            <th>价格</th>
            <th>购买数量</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <tr v-for="(item, index) of books">
            <td> {{item.id}} </td>
            <td> {{item.name}} </td>
            <td> {{item.date}} </td>
            <td> {{item.price | showPrice}} </td>
            <td> 
              <button @click="decrement(index)" :disabled="item.count <= 1">-</button>
              {{item.count}} 
              <button @click="increment(index)">+</button>
            </td>
            <td>
              <button @click="removeHandle(index)">移除</button>
            </td>
          </tr>
        </tbody>
      </table>
      <h4>总价格：{{totalPrice | showPrice}} </h4>
    </div>

    <div v-else>
      <h2>购物车为空</h2>
    </div>
  </div>

  <script src="../js/vue.js"></script>
  <script src="main.js"></script>
</body>

</html>